Improvement



E. A.v HILL. n

Brush-Machines.

No, 142,913, PatntedSeptemberl,1873.

' Irwe/ fr y Massachusetts,

STATES EDWIN A. HILL, 0F EAST CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN BRUSH-MASHIS August 8, 1873.

To all whom it may concern:

. Be it known that I, EDWIN A. HILL, of East Cambridge, Middlesex county, State of have invented certain. new and useful Improvements in Machines for Making Brushes; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, making a part of this specification, in which- Figure 1 is a perspective view of my device as arranged for operation, land Fig. 2 is a vertical section of a brush having the openings for containing' bristles formed by said device.

Letters of like name and kind refer to like parts in each of the figures.

As ordinaril'yaion structed, horse-brush backs are prepared for thejteception of the bristles hy means of a drill which forms a single hole at an operation, and when nished leaves the holes in a comparatively rough condition, and at unequal distances from each other.

'To obviate these objections and lessen the cost of the nished article is the design of my invention, which consists in the employment of a punch provided with two cutting-faces,

and capable of forming at 'one operation an opening having its upper and lower ends of diil'erent relative diameters, substantially as and for the purpose hereinafter specified.

In the annexed drawing, A and A represent a series of punches secured within a suitable`head,which is so arranged as to give to said punches a longitudinally-reciprocating movement. At their lower ends and for a short distance upward from the same, each of the punches A is reduced to the desired size, and at the upper end of such reduced portion al is formed a square or 4concave shoulder, a', which, when said punch is in use, constitutes a cutting-face. The bed-plate or die B is provided with openings b, which correspond in size to and receive the reduced ends aJ of the punches, so thatavhen any suitable material is interposedbetween said die and punches, and the latter are forced downward, portions of the material being operated upon will be pressed through said die-openings b, so as to form holes in said material.

As thesel punches are intended more especilally for use in the construction of horse i brushes, they-are relatively arranged within their head 'at distances which correspond to the positions of the openin gs c formed within the leather C for the recept-ion of the bristles I), and their longitudinal motion is so adj usted as to'carry the larger cutting-face a( nearly through to the die-plate, leaving sufficient substance only as a shoulder to prevent ,the bristles from being drawn through said hole when drawn into the samev with the fastening wire. As thus arranged, the smaller cuttingfacevawill remove a corresponding piece of leather from the back G, while the larger cutting-face a will increase the size of the opening c, by driving before it the chip out from the sides of the latter, and render the interior of said opening smooth, hard, and firm. The

bristles I) are insertedwithin the openings c,

and confined by wire in the usual manner.

The advantages' obtained by this device are: First, the opening formed has smooth hard wallswhich enable the bristles to be more easily inserted; second, the openings are equidistant from each other and uniform in size, so .as to permit of the insertion of a like quantity of bristles in each, by which means a better and more desirable article is produced than by the usual means; third, as any desired number of punches lcan be used in one head, it enablesA manufacturers to prepareL at one operation all of the openings within the back of a brush having anysize.while as heretofore constructed, but one opening could be formed at a time; fourth, the cost of the brush is materially lessened, and a better article produced than has heretofore been practicable. f

Having thus4 fully set forth the nature und merits of my invention, what I claim as new 1s- 1n combination with a suitable die-plate and operating mechanism, a punch, A, provided with two cutting-faces, a and a', substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 23d day of January, 1873.

EDWIN A. HILL.

Witnesses:

Asn COMBELL, S. L. HILL. 

